Browse Illinois Water Resources Center - Wastewater by Subject "Mathematical models"

  • Yen, Ben Chie; Wenzel, Harry G., Jr.; Mays, Larry W.; Tang, Wilson H. (University of Illinois at Urbana-Champaign. Water Resources Center, 1976-08)
    This report describes the development of a series of computer models capable of determining the diameter, slope and crown elevations of each sewer in a storm drainage system in which the layout and manhole locations are ...

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  • Wenzel, Harry G., Jr.; Yen, Ben Chie; Tang, Wilson H. (University of Illinois at Urbana-Champaign. Water Resources Center, 1979-06)
    This report describes further development of computer models for determining the diameter, slope and elevations of each pipe in a storm drainage system in which the layout and manhole locations are specified. The design ...

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  • Geselbracht, James J.; Brill Jr., E. Downey; Pfeffer, John T. (University of Illinois at Urbana-Champaign. Water Resources Center, 1986-04)
    The use of a rule-based modeling technique for the formal consideration of poorly modeled issues in a water quality management problem is illustrated in the context of wastewater treatment plant design. Sludge bulking is ...

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  • Tang, Chi-Chung; Brill Jr., E. Downey; Pfeffer, John T. (University of Illinois at Urbana-Champaign. Water Resources Center, 1984-11)
    A mathematical framework is developed for use in the design of a secondary wastewater treatment system. Mathematical models predicting the performance of various unit processes are used to construct a comprehensive system ...

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  • Yen, Ben Chie (University of Illinois at Urbana-Champaign. Water Resources Center, 1973-08)
    Increasing public concern on urban storm water quantity and quality problems demands a thorough review of the methodologies for flow prediction and design of urban storm drainage systems and development of improved ...

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  • Uber, James Gregory; Brill Jr., E. Downey; Pfeffer, John T. (University of Illinois at Urbana-Champaign. Water Resources Center, 1985-06)
    A method for sensitivity analysis in nonlinear programming is described and then illustrated using a least-cost model of a secondary wastewater treatment system. A sensitivity equation approach is used to calculate normalized ...

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  • Yen, Ben Chie; Pansic, Nicholas (University of Illinois at Urbana-Champaign. Water Resources Center, 1980-03)
    Surcharge of a sewer is the situation in which the sewer entrance and exit are submerged and the pipe is flowing full and under pressure. In this report the hydraulics of the surcharged flow as well as the open-channel ...

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